Newton Laws Flashcards
(25 cards)
What is Newton’s First Law of Motion?
An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an external force.
What is another name for Newton’s First Law of Motion?
The Law of Inertia.
True or False: Newton’s First Law of Motion is also known as the Law of Action and Reaction.
False
What is Newton’s Second Law of Motion?
The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
What is the formula for Newton’s Second Law of Motion?
F = ma (Force = mass x acceleration)
What is Newton’s Third Law of Motion?
For every action, there is an equal and opposite reaction.
True or False: Newton’s Third Law of Motion states that action and reaction forces are always equal in magnitude but opposite in direction.
True
In which law of motion does the concept of momentum play a significant role?
Newton’s Second Law of Motion.
What is the SI unit of force?
Newton (N)
What is the SI unit of mass?
Kilogram (kg)
What is the SI unit of acceleration?
Meter per second squared (m/s^2)
What is the SI unit of momentum?
Kilogram meter per second (kg m/s)
What is the acceleration due to gravity on Earth?
9.81 m/s^2
What is the net force acting on an object in equilibrium?
Zero
What happens to an object when the net force acting on it is zero?
It remains at rest or continues to move at a constant velocity.
What is the relationship between mass and inertia?
Mass is a measure of an object’s inertia.
Why is it easier to push a small car than a large truck?
The larger mass of the truck results in greater inertia.
What is the relationship between force and acceleration according to Newton’s Second Law?
Force is directly proportional to acceleration.
What happens to the acceleration of an object when the force acting on it increases?
The acceleration also increases.
What is the principle behind how rockets work based on Newton’s Third Law?
The expulsion of gas in one direction propels the rocket in the opposite direction.
What is the force experienced by a person standing on the ground?
Normal force
What is the direction of the normal force on an object resting on a horizontal surface?
Perpendicular to the surface, pointing upwards.
What is the force of gravity on an object with a mass of 10 kg on Earth?
98.1 N
What is the force of gravity on an object with a mass of 10 kg on the Moon? (Acceleration due to gravity on the Moon is 1.62 m/s^2)
16.2 N
